scholarly journals Influence of Pollen Nutrition on Honey Bee Health: Do Pollen Quality and Diversity Matter?

PLoS ONE ◽  
2013 ◽  
Vol 8 (8) ◽  
pp. e72016 ◽  
Author(s):  
Garance Di Pasquale ◽  
Marion Salignon ◽  
Yves Le Conte ◽  
Luc P. Belzunces ◽  
Axel Decourtye ◽  
...  
Keyword(s):  
Honey Bee ◽  
Pollen Quality ◽  
Bee Health ◽  
Honey Bee Health ◽  
Pollen Nutrition

Pollen nutrition affects honey bee stress resistance

2012 ◽  
Vol 5 (2) ◽  
pp. 175-189 ◽  
Author(s):  
Zachary Huang
Keyword(s):  
Honey Bee ◽  
Honey Bees ◽  
Fruits And Vegetables ◽  
Bee Health ◽  
Colony Collapse ◽  
Honey Bee Health ◽  
Related Enzyme ◽  
Bee Colonies ◽  
Bee Virus ◽  
Pollen Nutrition

The honey bee,Apis, is perhaps the most beneficial insect to humans because most of our fruits and vegetables depend on them for pollination. Yet these iconic insects have been plagued by many types of stresses. This paper reviews many lines of evidence pointing to the importance of pollen nutrition in honey bee health. In laboratory studies that used caged honey bees, poor pollen nutrition led to a reduction of worker bees’ resistance to the microsporidian,Nosema apis, an increase of bee’s sensitivity to pesticides, and an increased titer of bee virus. On the other hand, polyfloral pollen made bees more resistant to stresses by enhancing their immune related enzyme activities. At the colony level, good pollen nutrition increased honey bee’s resistance toNosema ceranaeor the ectoparasitic mite,Varroa destructor. The effects of both transportation and habitat changes on honey bees seem most likely mediated via decreased diversity, or amount, of pollen to the colonies. Pollen nutrition, therefore, might work together with other factors in reducing the bees’ resistance and exacerbate the effects of viruses, pesticides, or parasites, eventually resulting in Colony Collapse Disorder. Besides paying attention to all of these other factors, pollen nutrition should be an important focus in the future for maintaining healthy bee colonies.

scholarly journals Impact of Chronic Exposure to Sublethal Doses of Glyphosate on Honey Bee Immunity, Gut Microbiota and Infection by Pathogens

2021 ◽  
Vol 9 (4) ◽  
pp. 845
Author(s):  
Loreley Castelli ◽  
Sofía Balbuena ◽  
Belén Branchiccela ◽  
Pablo Zunino ◽  
Joanito Liberti ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
Honey Bee ◽  
Chronic Exposure ◽  
Pollination Services ◽  
Deformed Wing Virus ◽  
Immune Genes ◽  
Bee Health ◽  
Honey Bee Health ◽  
Sublethal Doses ◽  
The Impact

Glyphosate is the most used pesticide around the world. Although different studies have evidenced its negative effect on honey bees, including detrimental impacts on behavior, cognitive, sensory and developmental abilities, its use continues to grow. Recent studies have shown that it also alters the composition of the honey bee gut microbiota. In this study we explored the impact of chronic exposure to sublethal doses of glyphosate on the honey bee gut microbiota and its effects on the immune response, infection by Nosema ceranae and Deformed wing virus (DWV) and honey bee survival. Glyphosate combined with N. ceranae infection altered the structure and composition of the honey bee gut microbiota, for example by decreasing the relative abundance of the core members Snodgrassella alvi and Lactobacillus apis. Glyphosate increased the expression of some immune genes, possibly representing a physiological response to mitigate its negative effects. However, this response was not sufficient to maintain honey bee health, as glyphosate promoted the replication of DWV and decreased the expression of vitellogenin, which were accompanied by a reduced life span. Infection by N. ceranae also alters honey bee immunity although no synergistic effect with glyphosate was observed. These results corroborate previous findings suggesting deleterious effects of widespread use of glyphosate on honey bee health, and they contribute to elucidate the physiological mechanisms underlying a global decline of pollination services.

scholarly journals Correction to: Stakeholders’ views on sustaining honey bee health and beekeeping: the roles of ecological and social system drivers

2021 ◽  
Vol 36 (5) ◽  
pp. 1585-1585
Author(s):  
Mariia Fedoriak ◽  
Oleksandr Kulmanov ◽  
Alina Zhuk ◽  
Oleksandr Shkrobanets ◽  
Kateryna Tymchuk ◽  
...  
Keyword(s):  
Honey Bee ◽  
Social System ◽  
Bee Health ◽  
Honey Bee Health

scholarly journals Comparing Survival of Israeli Acute Paralysis Virus Infection among Stocks of U.S. Honey Bees

Insects ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 60
Author(s):  
Shilpi Bhatia ◽  
Saman S. Baral ◽  
Carlos Vega Melendez ◽  
Esmaeil Amiri ◽  
Olav Rueppell
Keyword(s):  
Honey Bee ◽  
Honey Bees ◽  
Virus Infections ◽  
Israeli Acute Paralysis Virus ◽  
Immune Genes ◽  
Starting Point ◽  
Bee Health ◽  
Honey Bee Health ◽  
Survival Differences ◽  
Paralysis Virus

Among numerous viruses that infect honey bees (Apis mellifera), Israeli acute paralysis virus (IAPV) can be linked to severe honey bee health problems. Breeding for virus resistance may improve honey bee health. To evaluate the potential for this approach, we compared the survival of IAPV infection among stocks from the U.S. We complemented the survival analysis with a survey of existing viruses in these stocks and assessing constitutive and induced expression of immune genes. Worker offspring from selected queens in a common apiary were inoculated with IAPV by topical applications after emergence to assess subsequent survival. Differences among stocks were small compared to variation within stocks, indicating the potential for improving honey bee survival of virus infections in all stocks. A positive relation between worker survival and virus load among stocks further suggested that honey bees may be able to adapt to better cope with viruses, while our molecular studies indicate that toll-6 may be related to survival differences among virus-infected worker bees. Together, these findings highlight the importance of viruses in queen breeding operations and provide a promising starting point for the quest to improve honey bee health by selectively breeding stock to be better able to survive virus infections.

scholarly journals A current perspective on honey bee health

Apidologie ◽  
2016 ◽  
Vol 47 (3) ◽  
pp. 273-275 ◽  
Author(s):  
Marina D. Meixner ◽  
Yves Le Conte
Keyword(s):  
Honey Bee ◽  
Current Perspective ◽  
Bee Health ◽  
Honey Bee Health ◽  
A Current

scholarly journals Genomic Signatures of Honey Bee Association in an Acetic Acid Symbiont

2020 ◽  
Vol 12 (10) ◽  
pp. 1882-1894
Author(s):  
Eric A Smith ◽  
Irene L G Newton
Keyword(s):  
Honey Bee ◽  
Honey Bees ◽  
Phylogenetic Analyses ◽  
Food Stores ◽  
Genomic Changes ◽  
Eusocial Insects ◽  
Us Economy ◽  
Bee Health ◽  
Honey Bee Health ◽  
Honey Bee Queens

Abstract Recent declines in the health of the honey bee have startled researchers and lay people alike as honey bees are agriculture’s most important pollinator. Honey bees are important pollinators of many major crops and add billions of dollars annually to the US economy through their services. One factor that may influence colony health is the microbial community. Indeed, the honey bee worker digestive tract harbors a characteristic community of bee-specific microbes, and the composition of this community is known to impact honey bee health. However, the honey bee is a superorganism, a colony of eusocial insects with overlapping generations where nestmates cooperate, building a hive, gathering and storing food, and raising brood. In contrast to what is known regarding the honey bee worker gut microbiome, less is known of the microbes associated with developing brood, with food stores, and with the rest of the built hive environment. More recently, the microbe Bombella apis was identified as associated with nectar, with developing larvae, and with honey bee queens. This bacterium is related to flower-associated microbes such as Saccharibacter floricola and other species in the genus Saccharibacter, and initial phylogenetic analyses placed it as sister to these environmental bacteria. Here, we used comparative genomics of multiple honey bee-associated strains and the nectar-associated Saccharibacter to identify genomic changes that may be associated with the ecological transition to honey bee association. We identified several genomic differences in the honey bee-associated strains, including a complete CRISPR/Cas system. Many of the changes we note here are predicted to confer upon Bombella the ability to survive in royal jelly and defend themselves against mobile elements, including phages. Our results are a first step toward identifying potential function of this microbe in the honey bee superorganism.

scholarly journals Descriptive Analysis of the Varroa Non-Reproduction Trait in Honey Bee Colonies and Association with Other Traits Related to Varroa Resistance

Insects ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 492 ◽  
Author(s):  
Sonia E. Eynard ◽  
Christina Sann ◽  
Benjamin Basso ◽  
Anne-Laure Guirao ◽  
Yves Le Conte ◽  
...  
Keyword(s):  
Honey Bee ◽  
Empirical Bayes ◽  
Descriptive Analysis ◽  
Field Studies ◽  
Colony Losses ◽  
Bee Colony ◽  
Bee Health ◽  
Honey Bee Health ◽  
Varroa Resistance ◽  
Resistance Traits

In the current context of worldwide honey bee colony losses, among which the varroa mite plays a major role, the hope to improve honey bee health lies in part in the breeding of varroa resistant colonies. To do so, methods used to evaluate varroa resistance need better understanding. Repeatability and correlations between traits such as mite non-reproduction (MNR), varroa sensitive hygiene (VSH), and hygienic behavior are poorly known, due to practical limitations and to their underlying complexity. We investigate (i) the variability, (ii) the repeatability of the MNR score, and (iii) its correlation with other resistance traits. To reduce the inherent variability of MNR scores, we propose to apply an empirical Bayes correction. In the short-term (ten days), MNR had a modest repeatability of 0.4, whereas in the long-term (a month), it had a low repeatability of 0.2, similar to other resistance traits. Within our dataset, there was no correlation between MNR and VSH. Although MNR is amongst the most popular varroa resistance estimates in field studies, its underlying complex mechanism is not fully understood. Its lack of correlation with better described resistance traits and low repeatability suggest that MNR needs to be interpreted cautiously, especially when used for selection.

scholarly journals Chronic exposure to neonicotinoids reduces honey bee health near corn crops

Science ◽  
2017 ◽  
Vol 356 (6345) ◽  
pp. 1395-1397 ◽  
Author(s):  
N. Tsvetkov ◽  
O. Samson-Robert ◽  
K. Sood ◽  
H. S. Patel ◽  
D. A. Malena ◽  
...  
Keyword(s):  
Acute Toxicity ◽  
Honey Bee ◽  
Honey Bees ◽  
Chronic Exposure ◽  
Social Immunity ◽  
Active Season ◽  
Bee Health ◽  
Honey Bee Health ◽  
Over Time

Experiments linking neonicotinoids and declining bee health have been criticized for not simulating realistic exposure. Here we quantified the duration and magnitude of neonicotinoid exposure in Canada’s corn-growing regions and used these data to design realistic experiments to investigate the effect of such insecticides on honey bees. Colonies near corn were naturally exposed to neonicotinoids for up to 4 months—the majority of the honey bee’s active season. Realistic experiments showed that neonicotinoids increased worker mortality and were associated with declines in social immunity and increased queenlessness over time. We also discovered that the acute toxicity of neonicotinoids to honey bees doubles in the presence of a commonly encountered fungicide. Our work demonstrates that field-realistic exposure to neonicotinoids can reduce honey bee health in corn-growing regions.

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